Hauv cov txheej txheem miniaturization thiab teeb meem ntawm cov khoom siv hluav taws xob niaj hnub no, PCB (luam tawm Circuit Board) ua lub luag haujlwm tseem ceeb. Raws li tus choj ntawm cov khoom siv hluav taws xob, PCB ua kom muaj kev sib kis tau zoo ntawm cov teeb liab thiab lub zog ruaj khov. Txawm li cas los xij, thaum lub sij hawm nws cov txheej txheem raug thiab nyuaj, ntau yam tsis xws luag tshwm sim los ntawm lub sijhawm, cuam tshuam rau kev ua haujlwm thiab kev ntseeg siab ntawm cov khoom. Tsab ntawv xov xwm no yuav tham nrog koj txog yam tsis xws luag ntawm PCB Circuit Boards thiab cov laj thawj tom qab lawv, muab cov ncauj lus kom ntxaws "kev kuaj xyuas kev noj qab haus huv" rau kev tsim thiab tsim khoom siv hluav taws xob.
1. luv Circuit Court thiab qhib Circuit Court
Yog vim li cas tsom xam:
Kev tsim yuam kev: Kev tsis saib xyuas thaum lub sij hawm tsim, xws li nruj routing spacing los yog kev sib raug zoo teeb meem ntawm cov khaubncaws sab nraud povtseg, tuaj yeem ua rau luv luv lossis qhib.
Cov txheej txheem tsim khoom: Tsis tiav etching, qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv tuaj yeem ua rau luv luv Circuit Court lossis qhib Circuit Court.
2. Solder npog qhov tsis xws luag
Yog vim li cas tsom xam:
Cov txheej txheem tsis sib xws: Yog tias cov khoom siv tiv thaiv tsis sib xws thaum lub sijhawm txheej txheej txheej txheej, cov ntawv ci tooj liab yuav raug nthuav tawm, ua rau muaj kev pheej hmoo ntawm luv luv Circuit Court.
Kev kho tsis zoo: Kev tswj tsis zoo ntawm qhov kub thiab lub sij hawm ua rau lub solder tiv thaiv tsis tuaj yeem kho, cuam tshuam rau nws cov kev tiv thaiv thiab kav ntev.
3. Kev luam ntawv silk screen tsis zoo
Yog vim li cas tsom xam:
Kev luam ntawv raug: Cov khoom siv tshuaj ntsuam luam ntawv muaj qhov tsis txaus lossis kev ua haujlwm tsis raug, ua rau pom qhov muag plooj, ploj lossis offset cim.
Ink quality teeb meem: Kev siv cov ink inferior los yog tsis zoo compatibility ntawm tus number case thiab phaj cuam tshuam rau lub clarity thiab adhesion ntawm lub logo.
4. Qhov tsis xws luag
Yog vim li cas tsom xam:
Drilling deviation: laum me ntsis hnav lossis qhov chaw tsis raug ua rau lub qhov taub loj dua los yog sib txawv ntawm txoj haujlwm tsim.
Kev tshem tawm cov kua nplaum tsis tiav: Cov residual resin tom qab drilling tsis tau muab tshem tawm tag, uas yuav cuam tshuam rau cov vuam zoo thiab hluav taws xob ua haujlwm.
5. Interlayer sib cais thiab foaming
Yog vim li cas tsom xam:
Thermal stress: Kub kub thaum lub sij hawm reflow soldering txheej txheem yuav ua rau ib tug mismatch nyob rau hauv expansion coefficients ntawm txawv cov ntaub ntawv, ua rau sib cais ntawm txheej.
Moisture penetration: Underbaked PCBs nqus dej noo ua ntej sib dhos, tsim cov npuas npuas thaum soldering, ua rau sab hauv blistering.
6. Plating tsis zoo
Yog vim li cas tsom xam:
Tsis sib xws plating: Tsis sib npaug ntawm qhov tam sim no ntom lossis tsis ruaj khov ntawm cov txheej txheem plating ua rau tsis sib xws ntawm cov txheej tooj liab plating, cuam tshuam rau conductivity thiab solderability.
Kev ua qias tuaj: Ntau dhau impurities hauv cov tshuaj plating cuam tshuam rau qhov zoo ntawm cov txheej thiab txawm tsim cov pinholes los yog ntxhib nto.
Txoj kev daws teeb meem:
Hauv kev teb rau cov teeb meem saum toj no, kev ntsuas tau suav nrog tab sis tsis txwv rau:
Optimized Design: Siv cov software siab tshaj CAD rau kev tsim qauv thiab ua tiav DFM (Design for Manufacturability) tshuaj xyuas.
Txhim kho cov txheej txheem tswj: Txhim kho kev soj ntsuam thaum lub sijhawm tsim khoom, xws li siv cov cuab yeej ua haujlwm siab thiab tswj cov txheej txheem nruj me ntsis.
Kev xaiv cov khoom siv thiab kev tswj hwm: Xaiv cov khoom zoo raw khoom thiab xyuas kom muaj kev cia zoo los tiv thaiv cov ntaub ntawv kom tsis txhob ntub los yog tsis zoo.
Kev soj ntsuam zoo: Ua kom muaj kev tswj xyuas zoo, suav nrog AOI (kev tshuaj xyuas tsis siv neeg kho qhov muag), kuaj X-ray, thiab lwm yam, txhawm rau txheeb xyuas thiab kho qhov tsis xws luag raws sijhawm.
Los ntawm kev nkag siab tob txog cov teeb meem ntawm PCB Circuit Board thiab lawv cov laj thawj, cov tuam txhab lag luam tuaj yeem siv cov kev ntsuas zoo los tiv thaiv cov teeb meem no, yog li txhim kho cov khoom lag luam tawm los thiab ua kom muaj kev ntseeg siab ntawm cov khoom siv hluav taws xob. Nrog rau kev nce qib ntawm kev siv thev naus laus zis, muaj ntau yam kev sib tw hauv kev tsim PCB, tab sis los ntawm kev tswj xyuas kev tshawb fawb thiab kev tsim kho thev naus laus zis, cov teeb meem no tau dhau los ntawm ib qho.